Air-compressor adapted to work as a vacuum-pump.



E. GAUCHER'.

APPLIUATIOI FILED YEBJB, 1910.

Patented Aug.

'mi gums rangs insmrqorolrr.' n. c.

AIB COMPRESSOR ADAPTED T0 WORK AB A YAUUUM PUMP.

, E. GAUGHER. i 1 4 AIB. UOMPBESSOR ADAPTBD TOWGBK AS A VACUUM PUMP. APPLICATION FILED FELIU, 1910.

967,013. l Patented Ag. 9,1910;

geants-annu s.

' Fw @55E ELIE GAUCHER, 0Fy CONSTAN'IINOPLE, TURKEY.

AIR-COMPRESSOR ADAPTED T0 VTORK AS A. VACUUM-PUMP.

ecrans.

` Specification of Letters Patent.

Patented Aug. 9, 1910.

Application Hed February 28, 1910. Serial No. 546,442.

T o all whom it may concern:

Be it known that I, ELIE GAUCHER, a citizen of the French Republic, and resident oi Constantinople, Turkey2 have invented certain new and useful Improvements in and Relating to Air-Compressors Adapted to Wbrk as Vacuum-Pumps, of which the following is a specicatio This, invention relates to air compressors and more especially to compressors of this kind wherein oilvis made use of for delivering and sucking in the air, theobject being to provide a device of this kind which will be adapted to serve as a simple air compressor, as a simple vacuum pump and at the same time as an air compressor and a vacuum pump.

In the accompanying drawings: Figure l is a longitudinal vertical section of the improved apparatus; Fig. 2 shows a section on line A-B of Fig. 1; Fig. 3 is anaxial vertical section of an auxiliary oil receiver hereafter referred to; Fig. 4 shows a horizontal section of same on line C-D of Fig. 8.

My improved air compressor and vacuum pump comprises an oil tank 1 the upperpart of which is inclined and carries two tubular extensions 3 and 4 provided with flanges 5. Secured to thetubular extension 3 by means of bolts and a tight joint is the air chamber 6 the upper part oi which is concave on its inside in order to facilitate the rising of the air; this air chamber is enlarged at its upper part so as to reduce to some extent the height the oil will be lifted when the apparatus is operated. The other extension 4 of the tank receives the pump cylinder 7 which is secured to the flange 5 in a tight manner by means of bolts and passes through the tubular extension 4 and projects on a certain distance into the tank 1. The cylinder receives the piston S` the rod 8 of which is vertically reciprocated in any suitable manner. The cylinder carries laterally on its upper part a tubular extension 9 the object of which will be explained later on, The tank 1 is filled with oil which rises in the cylinder 7 and bathes therein the piston. It rises also in the air chamber 6 to the same level, the volume of the air chamber being calculated in such a manner that when the piston 8 is at the upper end ot' its stroke,

the level of the oil in the oil chamber will be not lower than the opening of the tubular extension 9.

An emptying cock 10 has been provided at the bottom of the tank 1 while the top of the air chamber 6 has been provided with an oil introducing opening which normally is closed by a screw threaded plug 11. The air chamber 6 also carries the sucking in and delivering valves 12 and 13 of the compressor. The delivery valve 13 is vertically guided by its rod in a suitable guide 14 and is automatically brought back on its seat 15 by a s Jring 14. The valve seat 15 is provided at its ower part with a small tubular extension 1G which freely projects into the escape portI of the air chamber 6 with the object to prevent the oil from climbing along the walls and from thus passing through the opening' of the valve seat.` rIhe air delivering duct opens out in an oil separator 1G through `a tubular nozzle 17 which is bent at right angles. In front of this nozzle 17 the oil separator carries on its bottom a tubular extension 18 with which a duct 19 is connected which will b'e mentioned more in detail later on. The bent nozzle 17 has for its object in case oil would be delivered through the delivering pipe of the compresser, to throw this oil into the tubular extension 18. Opposite the opening of noz zle 17, the oil separator 1G is provided with an :inspecting and cleansing opening which normally is closed by a screw threaded plug 20. vThe oil separator 16 carries on its top the air delivering duct 21 which is divided into two branches 22, 23 each provided with a stop cock 24 and 25 respectively. The duct 21 contains a non return valve 26 provided with a washer madel of india rubber `or other yielding material adapted to form a tightjoint. This valve is vertically guided by its rod in al guide Q7 and a spring 28 constantly tends to bring it back on its seat. The admission valve of the com presser' also slides 1n a guide 29 and 1s brought back on its seat by a spring 80. On

the suction pipe'Sl of the compressor are Abranched two pipes, one 32, of which is provided with a stop cock 33 and can be connected with the tubular extension 9 of the cylinder 7 through the medium of a pipe 34 and trap 35. In this pipe 34 opens out a little above the said trap 35, the duct 19 which comes from the oil separator 16 and which is provided a little above its point of connection with the pipe 34 with a stop cock 36. The suction pipe 34 is also provided with a stop cock 37.

The apparatus described above now may be employed as a simple air pump that is to say as a pump yallowing to obtain compressed air or the vacuum. If one wishes to employ the apparatusfor producing simultaneously a vacuum and compressed air, it will be necessary to complete it by the oil collecting apparatus, shown in Figs. 3 and 4 of the drawings. This oil collector is intended to be mounted below or on the side of the compressor proper and comprises a receiver 38 containing a float filled with cork washers intended to prevent the deformation of the ioat. The receiver is provided at its bottom with an opening which is sufficiently large to allow the introduction of the float and is normally closed by a plate 40. The iioat is hingedly conl nected at its lower end with a lever 41 housed in a tubular extension 42 of the receiver 38. This extension 42 has at its free end and at its top an opening which is hermetically closed by a cover 43 into which a plug 44 is screwed which carries at its lower end projecting into the tubular eX- I tension 42, the fulcrum pivot 45 for the ioat lever 41. The free end of the latter carries a valve needle 46 adapted to engage a seat provided in the lower end of a short tube 47 screwed into the cover 43 andcontaining a non-return valve 48 guided by a guide 49 and automatically held to its seat by a spring 50. The tube is connected with the air chamber 6 of the compressor by means of a pipe 51 provided near the said air chamber with. a stop cock 52. The cover 43 is also provided with a iilling opening which is normally closed by a screw threaded plug 53. The lower part of the receiver 38 is connected by a pipe 54 with the bottom part of the trap 35 of the compressor the pipe 54 being provided with a stop cock 57 near the said trap and connected under the said stop cock 57 by means of a branch pipe 55 with the pipe 19 of the compressor above the cock 36 of the said pipe. Pipe 55 is provided near its junction with the pipe 19 with a stop cock 56. The upper chamber of the receiver 38 is provided with a `tubular extension 58 provided with a stop cock 59. It is also connected by a duct 60 with the lower part of the receiver in order to reestablish the equilibrium of the pressure. In operation, the receiver 38 and the tubular extension 42 are iilled with oil through the illing opening which is thereafter closed by the screw plug 53.

In order to bring the compressor into working order the tank 1 must be filled with oil. To this end, the pump piston is lowered and brought to the lower end of its stroke, then the plug 11 is unscrewed and oil is introduced into the tank. Thilo the oil rises in the tank, it eXpels therefrom all the air owing to the inclined position of the upper wall 2 thereof. lVhen the tank is filled, the piston is brought to the upper end of its stroke and oil is again introduced until it reaches the level of the tubular extension 9 of the cylinder; thereafter the plug 11 is put again in position and the apparatus is ready for working.

For the work of the apparatus, three cases may occur: 1st the apparatus may be used simply as an air compressor; or 2nd it may be employed for producing a vacuum and 3rd the apparatus may serve for both purposes, simultaneously. In the first case the cocks 33, 56, 36, 57 and 52 are closed while the cocks 37 and 24, 25 are opened. The piston when descending delivers the oil which, in turn, rises in the air chamber G and delivers the air contained in the latter through the delivering valve 13, the bent tubular nozzle 17 the oil separator 16, the non-return valve 26 into one of the ducts 22, 23 or both. lVhen the piston rises, it causes the level of the oil to be lowered in the air chambersl 6 and thus produces the sucking in ot the air through the valve 12, the duct 34 the trap 35 and the tubular extension 7. lf owing to a too violent compression it should happen that oil would pass between the piston and the walls of the cylinder, the said oil would iow into the trap 35 and would at once be sucked in through the duct 34 and would thus be brought back into the air space 6 and tank 1.

When it isonly desired to produce a vacuum, the cocks 24, 37, 25, 56, 57 and 52 are closed and the cocks 33 and 36 are opened. rPhe suction then takes place through 33 and the delivery through 13, 17, 18, 19, 36 and 9 into the cylinder 7. If, owing to a too strong suction oil would pass between the cylinder and the piston and would raise the level in 6, the said oil would be delivered along the same way as the air and be brought back into the cylinder 7.

Then it is desired to cause the apparatus to produce a vacuum and furnish at the same time compressed air, it is connected in the manner above described with the oil collector 38. The cocks 24, 25 i'or the compressed air and the cock 33 for the suction as well as the cocks 56 and are opened while the cocks 37, 36, 57 and 59 are closed. It therefore during the working of the apparatus oil is carried with the air into the delivery duct, it is thrown by the bent nozzle 17 into the escape duct 18, 19 which conveys it through the cock 56 and the ducts 55 and 54 into the receiver 38. Here it lifts the float 39 which withdraws the valve ncedle 46 from its seat so that the oil is sucked by the suction of the pump into the air chamber through the valve 48, the duct 5l and the cock 52. If on the contrary owing to a too strong compression oil would be collected on the piston 8, it would be sutiicient to close the cocks 36 and 56 and to open the cock 57 as well as the cock 59 so asto allow the oil to flow by gravity through 9, 35, 57 and 54 into the oil collector 38 wherefroin it will again be sucked into the pump body as before.

Having now fully described my said invention, what I claim and desire to secure by Letters Patent is l. In an air compressor, the combination of an oil tank, an air chamber secured to the oil tank, a pump cylinder secured with said.

tank, a piston in said cylinder, a tubular extension on said cylinder above the highest point reached by the pump piston, a trap connected with said tubular extension, a suction pipe leading from the said trap into said air chamber, a suction valve and stop cock in the said suction pipe, an air delivery duct connected with said air chamber, a delivery valve, an oil separator and a nonreturn valve in said delivery pipe and a pipe leading from the said oil separator to the said trap, substantially as and for the purpose set forth.

2. In an air compressor, the combination of an oil tank, having an inclined top, an air chamber removably secured to the said oil tank, a pump cylinder also removably connected with said oil tank a piston in said cylinder, a lateral tubular extension on said :ylinder above the highest point reached by the piston, a trap connected with said tubular extension, a suction pipe coni'iecting said trap with the said air chamber, a suction valve and a stop cock in said suction pipe, a vertical air delivery duct connected with said air chamber, a delivery valve in said de livery pipe, a small tubular extension descending freely from the seat of said delivery valve, an oil separator inserted in said delivery pipe and comprising a bent nozzle, a pipe leading from said oil separator to the said trap and a nonreturn valve inserted in said delivery pipe, substantially as and for the purpose set forth.

3. In a vacuum pump, the combination of an oil tank, an air chamber and a pump cyl inder removably secured to said oil tank, a piston in said cylinder, a lateral tubular eX- tension provided on said cylinder above the highest point reached by said piston, a trap connected with said tubular extension, a suction pipe connected with said air chamber, a suction valve in said suction pipe, a

delivery pipe leading from the said air chamber and connected with said trap and a delivery valve in said delivery duct, substantially as and for the purpose set forth.

4. In an apparatus adapted to workY at `will as an air compressor and as an air pump, the combination of an oil tank, an air `chamber and a pump cylinder removably secured to said oil tank, a piston in said pump cylinder, a lateral tubular extension provided on said cylinder, a trap connected with said tubular extension, a suction tube on said air chamber7 a suction valve in said suction tube, a suction pipe provided with a stop cock and branched on said suction tube, a second suction pipe also provided with astop cock and branched on said suc tion tube and connected with said trap, a vertical air delivering pipe connected with said air chamber and containing in order from the latter, a delivery valve, an oil separator, a non return valve and means for closing the escape duct; and a pipe leading from the said oil separator to the said trap, substantially as and for the purpose set forth.

5. In an apparatus adapted to Work at will as an air compressor and a vacuum pump and simultaneously as an air compressor and a vacuum pump, the combination of an oil tank having an inclined upper wall, an air chamber and a 4pump cylinder removably secured to said oil tank, a piston in said pump cylinder, a lateral tubular extension provided on said cylinder, a trap connected with the said tubular extension, a suction tube on said air chamber, a suction valve inserted in said suction tube, a vacuum pipe provided with a stop cock and branched on said suction tube, a suction pipe also provided with a stop cock and branched onsaid suction tube, this suction pipe being connected on the other hand with said trap, a vertical air delivering pipe connected with said air chamber and containing superposed in the order named: an air delivering valve, an oil separator, a non return valve and means for closing the delivery pipe above the non return valve; a duct leading from the oil separator to the said trap and provided with a stop cock near the latter and an oil collector comprising a receiver, a float in the receiver, a tubular extension on said re ceiver and adapted to receive the lever of the float, means for pivotally supporting said lever', a suction duct leading from said tubular extension of the receiver to the said air chamber and provided with a stop cock near the latter, a valve needle connected with said lioat lever and adapted to control the entrance to said suction duct, a non-return valve in said suction duct, an air escape provided with a stop cock and mounted on said receiver, a duct connecting the upper and lower parts of said receiver, a

substantially as and for the purpose set forth.

In testimony 'whereof I have hereunto set my hand in presence of two Witnesses.

ELIE GAUCHER.

Witnesses P. CRAPHE, S. CLUZELAND. 

